Chemical treatment of wood fiber and its reinforced unsaturated polyester composites

Abstract

In order to enhance the interfacial adhesion between wood fiber and an unsaturated polyester matrix (UPE), acrylic acid (acrylic acid)/poly(methyl methacrylate), and (acrylic acid)/silanization (AAS) were used to treat the wood fibers. The mechanical properties and the impact fracture surfaces of the prepared composites were measured and characterized, and the fracture mechanism of these kinds of composites was analyzed. The results showed that the AAS composites possessed the optimum comprehensive mechanical properties. When the weight fraction of wood fiber was 16%, the flexural strength and flexural modulus of the AAS composites were increased by 28.9 and 51.8%, respectively, compared to those of untreated composites. The highest tensile strength and lowest water absorption were also noted for AAS composites. These composites possessed the strongest interfacial adhesion between wood fiber and the UPE matrix. J. VINYL ADDIT. TECHNOL., 19:18–24, 2013. © 2013 Society of Plastics Engineers

Colour changes and morphological performance of impregnated jabon wood using polymerised merbau extractives

“…Expected crosslinking and coupling reactions between the copolymers formed from the insertion of PME22 and PME33 and the wood cell wall happened via aldehyde ring and -COOH with free OH groups, respectively. This similar mechanism occurred for epoxy in treated wood using MMA (methyl methacrylate) and GMA (glycidyl methacrylate) (Li et al 2012, Zhang et al 2013, Mattos et al 2014, Mattos et al 2015, Mattos et al 2016. Table 3.…”

Compósitos polímero-madeira preparados por polimerização in situ de metil metacrilato usando aditivos bifuncionais

“…De acordo com Li et al [12] e Zhang et al [14] as ligações químicas esperadas entre a madeira e os copolímeros de poli(MMA-co-GMA) e poli(MMA-co-MAA), ocorrem respectivamente, via abertura do anel epóxi terminal (GMA) e grupo carboxílico (MAA) com as hidroxilas livres da madeira.…”

Pinewood Composite Prepared byIn SituGraft Polymerization of Epoxy Monomer

“…This new class of wood materials is very attractive because it uses low quality woods and takes advantage of waste from other industrial processes to prepare high quality, homogeneous finished materials [15][16][17][18][19][20]. Regarding these composites, many authors have stated that the interaction between reinforcement and the matrix is the most important factor in defining the final properties of the materials [11,12,[20][21][22][23]. Previous conclusions reiterate the selection of polar monomers, such as GMA, in the preparation of WPCs.…”